Hemitheini
Bruand d'Uzelle, 1846
emerald moths
Hemitheini is the largest tribe of within the Geometrinae, first described by Charles Théophile Bruand d'Uzelle in 1846. Though containing relatively few in absolute terms, it encompasses substantial . The tribe includes several groups sometimes treated as separate tribes (Comostolini, Hemistolini, Jodini, Microloxiini, Thalassodini, Thalerini), but these are likely and are here retained within Hemitheini pending further phylogenetic study. In some , Hemitheini is reduced to subtribe rank as Hemitheiti.
Pronunciation
How to pronounce Hemitheini: //hɛmɪˈθeɪnaɪ//
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Identification
Members of Hemitheini are recognized by their small size and green coloration typical of Geometrinae emerald . Definitive tribal-level diagnostic characters require examination of and patterns. The tribe can be distinguished from other Geometrinae tribes primarily through molecular and detailed morphological analysis rather than field characters alone.
Images
Distribution
The tribe has a broad distribution corresponding to that of the Geometrinae, with substantial representation in tropical and subtropical regions of Asia, Africa, and the Americas. Specific range boundaries for the tribe as currently circumscribed are poorly defined due to ongoing taxonomic revision of included .
Human Relevance
The common emerald (Hemithea aestivaria) is a widespread Palearctic and the species of the type Hemithea. Several genera within the tribe (e.g., Chlorochlamys, Xerochlora) are subjects of ongoing taxonomic revision in North America.
Similar Taxa
- Other Geometrinae tribesHemitheini overlaps morphologically with other emerald groups; separation historically relied on pattern and male , but current evidence suggests many previously recognized tribes are with respect to Hemitheini.
More Details
Taxonomic instability
The circumscription of Hemitheini remains in flux. Beljaev (2007) documented substantial taxonomic changes in East Asian emerald , and the inclusion of Comostolini, Hemistolini, Jodini, Microloxiini, Thalassodini, and Thalerini reflects conservative treatment of likely groups.
Rank variation
In treating Geometrinae more broadly, Hemitheini is reduced to subtribe Hemitheiti. This rank instability complicates comparative studies across different taxonomic systems.